Dota 2 is an electronic game in the Action Real-Time Strategy genre (abbreviated as ARTS) or also considered in the Multiplayer Online Battle Arena genre (abbreviated as MOBA), was developed by Valve Corporation as a follow-up to Defense of the Ancients (DotA), a mod (mod) on a map developed for Warcraft III. Although its predecessor was amateurishly developed, DotA 2 was welcomed by Valve - in close partnership with the original producer, IceFrog - to be professionally developed and launched on the world market. It was officially released on July 9, 2013 the full version of the free to play game [4] available on the Steam platform only.